A racing bicycle, also known as a road bike, is a bicycle designed for competitive road cycling, a sport governed by according to the rules of the Union Cycliste Internationale (UCI). The UCI rules were altered in 1934 to exclude recumbent bicycles.
The most important characteristics about a racing bicycle are its weight and stiffnesswhich determine the efficiency at which the power from a rider's pedal strokes can be transferred to the drive-train and subsequently to its wheels. To this effect racing bicycles may sacrifice comfort for speed. The drop handlebars are positioned lower than the saddle in order to put the rider in a more aerodynamic posture. The front and back wheels are close together so the bicycle has quick handling. The derailleur gear ratios are closely spaced so that the rider can pedal at their optimum cadence. Other racing bicycles, especially those used in time trialling, prioritize aerodynamics over comfort.
(Source: Wikipedia, the free encyclopedia, see http://en.wikipedia.org/wiki/Racing_bicycle)

Note: The extraction of the abstract from the Wikipedia page may sometimes yield imperfect results. We are improving the algorithm regularly.

Note: This is a generic list. Some of the properties may not be applicable to this particular type of object.

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Note: In HTML5, it is valid to use the <link> element in the body of a HTML document.

Here is a complete example:

<!DOCTYPE html><html><head><metahttp-equiv="Content-Type"content="text/html; charset=UTF-8"/><title>An offer to sell a / some Racing_bicycle</title></head><body><divitemscopeitemtype="http://schema.org/Product"itemid="#product"><linkitemprop="additionalType"href="http://www.productontology.org/id/Racing_bicycle"/><spanitemprop="name">.. a short name for the object ...</span>
Product description:
<spanitemprop="description">... a longer description ...</span><divitemprop="offers"itemscopeitemtype="http://schema.org/Offer"itemid="#offer"><spanitemprop="price">$19.99</span><linkitemprop="availability"href="http://schema.org/InStock"/>In stock
</div></div></body></html>

RDFa

<!DOCTYPE html><htmlversion="HTML+RDFa 1.1"xmlns="http://www.w3.org/1999/xhtml"><head><metahttp-equiv="Content-Type"content="text/html; charset=UTF-8"/><title>An offer to sell a / some Racing_bicycle</title></head><body><divxmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"xmlns:foaf="http://xmlns.com/foaf/0.1/"xmlns:gr="http://purl.org/goodrelations/v1#"xmlns:pto="http://www.productontology.org/id/"xmlns:foo="http://example.com/"xmlns:xsd="http://www.w3.org/2001/XMLSchema#"><!-- The agent (person or company) who is offering it --><divabout="#ACMECorp"typeof="gr:BusinessEntity"><divproperty="gr:legalName">ACME Corp</div><divrel="gr:offers"><!-- The offer to sell it --><divabout="#offer"typeof="gr:Offering"><divrel="gr:hasBusinessFunction"resource="http://purl.org/goodrelations/v1#Sell"></div><divrel="gr:includes"><!-- The object --><divabout="#myObject"typeof="http://www.productontology.org/id/Racing_bicycle"><divrel="rdf:type"resource="http://purl.org/goodrelations/v1#SomeItems"></div><divproperty="gr:description"xml:lang="en">... a longer description ...</div><divproperty="gr:name"xml:lang="en">.. a short name for the object ...</div></div></div><divrel="foaf:page"resource="http://URI_of_the_page_containing_the_offer"></div><divrel="gr:hasPriceSpecification"><divtypeof="gr:UnitPriceSpecification"><divproperty="gr:hasCurrency"content="USD"datatype="xsd:string">$ </div><divproperty="gr:hasCurrencyValue"datatype="xsd:float">19.99</div><divproperty="gr:validThrough"content="2011-12-24T00:00:00+01:00"datatype="xsd:dateTime"></div></div></div><divproperty="gr:validFrom"content="2011-01-24T00:00:00+01:00"datatype="xsd:dateTime"></div><divproperty="gr:validThrough"content="2011-12-24T00:00:00+01:00"datatype="xsd:dateTime"></div></div></div></div></div></body></html>

Note: Replace gr:SomeItems (http://purl.org/goodrelations/v1#SomeItems) by gr:Individual if you are describing a unique object of that kind (e.g. antique furniture).

RDF/XML

<?xml version="1.0" encoding="UTF-8" ?><rdf:RDFxmlns:gr="http://purl.org/goodrelations/v1#"xmlns:pto="http://www.productontology.org/id/"xmlns:xsd="http://www.w3.org/2001/XMLSchema#"xmlns:foaf="http://xmlns.com/foaf/0.1/"xmlns:foo="http://example.com/"xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"><!-- The object --><rdf:Descriptionrdf:about="http://example.com/myObject"><rdf:typerdf:resource="http://www.productontology.org/id/Racing_bicycle"/><rdf:typerdf:resource="http://purl.org/goodrelations/v1#SomeItems"/><gr:namexml:lang="en">... a short name for the object ...</gr:name><gr:descriptionxml:lang="en">... a longer description ...</gr:description></rdf:Description><!-- The agent (person or company) who is offering it --><gr:BusinessEntityrdf:about="http://example.com/ACMECorp"><gr:legalName>ACME Corp</gr:legalName><gr:offersrdf:resource="http://example.com/Offer"/></gr:BusinessEntity><!-- The offer to sell it --><gr:Offeringrdf:about="http://example.com/Offer"><gr:includesrdf:resource="http://example.com/myObject"/><foaf:pagerdf:resource="http://URI_of_the_page_containing_the_offer"/><gr:hasBusinessFunctionrdf:resource="http://purl.org/goodrelations/v1#Sell"/><gr:validFromrdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">
2011-01-24T00:00:00+01:00</gr:validFrom><gr:validThroughrdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">
2011-12-24T00:00:00+01:00</gr:validThrough><gr:hasPriceSpecification><gr:UnitPriceSpecification><gr:hasCurrencyrdf:datatype="http://www.w3.org/2001/XMLSchema#string">USD</gr:hasCurrency><gr:hasCurrencyValuerdf:datatype="http://www.w3.org/2001/XMLSchema#float">19.99</gr:hasCurrencyValue><gr:validThroughrdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">
2011-12-24T00:00:00+01:00</gr:validThrough></gr:UnitPriceSpecification></gr:hasPriceSpecification></gr:Offering></rdf:RDF>

Note: Replace gr:SomeItems (http://purl.org/goodrelations/v1#SomeItems) by gr:Individual if you are describing a unique object of that kind (e.g. antique furniture).

Caching Policy

In order to minimize the load on the Wikipedia API, all requests are cached internally for 72 hours. This means that changes to the English Wikipedia will be available in this service within 72 hours or less if the same entry has been requested before. Classes not requested within the last six hours are always guaranteed to be in sync with the latest version in Wikipedia.

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Acknowledgements

Thanks to Stefano Bertolo, Julien Chaumond, Bob Ferris, Kingsley Idehen, Axel Polleres, Andreas Radinger, Alex Stolz, and Giovanni Tummarello for very valuable feedback, and to Katharina Siorpaes and Daniel Bachlechner, who contributed to the initial analysis of the stability of Wikipedia URIs back in 2007.